@misc{indiciae115353a2b9d6,
  title = {Inter-labortory variations in urinary oestriol estimates.},
  author = {M Lever and S M Peace},
  year = {1974},
  doi = {10.1111/j.1471-0528.1974.tb00426.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4816030/},
  note = {Source identifier: 4816030}
}